CN110471212B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN110471212B
CN110471212B CN201910807388.9A CN201910807388A CN110471212B CN 110471212 B CN110471212 B CN 110471212B CN 201910807388 A CN201910807388 A CN 201910807388A CN 110471212 B CN110471212 B CN 110471212B
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layer
phase difference
liquid crystal
alignment
display panel
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CN110471212A (en
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梁翠翠
王斌
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to CN201910807388.9A priority Critical patent/CN110471212B/en
Publication of CN110471212A publication Critical patent/CN110471212A/en
Priority to US16/852,874 priority patent/US11119354B2/en
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13725—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on guest-host interaction
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention provides a display panel and a display device, and belongs to the technical field of display. The invention provides a display panel which comprises a substrate and a plurality of pixel units, wherein each pixel unit is divided into a display area and a transparent area, a light-emitting device and a driving device are arranged in the display area of each pixel unit, and the display panel further comprises a polarization layer which is positioned on one side, away from the substrate, of the layer where the light-emitting device is positioned. The polarizing layer corresponds to the position of the display area and can absorb the external environment light reflected in the display area, and the polarizing layer corresponds to the position of the transparent area and can transmit the external environment light. According to the display panel provided by the invention, the polarization layer can carry out different treatments on light in the display area and the transparent area, the external environment light reflected by the display area is absorbed in the display area, and the external environment light is transmitted in the transparent area, so that the light reflectivity of the display area is reduced, and the light transmittance of the transparent area is not influenced.

Description

Display panel and display device
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display panel and a display device.
Background
With the development of display technology, various new technologies are emerging, and the transparent display technology is receiving more and more attention due to the characteristic that the display panel is transparent. A transparent display panel is a display device in which a background behind the panel can be seen through the panel on one side of the display panel. Generally, a transparent display panel has a display area and a transparent area, the transparent area has high light transmittance, external light can penetrate through the whole display panel, a plurality of light emitting devices are arranged in the display area, a driving device is arranged below the light emitting devices, the external light is irradiated to the display area and then reflected by the light emitting devices and the driving device, and particularly enters human eyes after being reflected by a cathode of the light emitting devices, so that the display effect is influenced. In the prior art, to solve this problem, a Polarizer (POL) is usually added on the light emitting device to absorb the light reflected by the light emitting device and the driving device, but the Polarizer reduces the transmittance of the transparent region of the display panel, thereby affecting the transparency of the display panel.
Disclosure of Invention
The present invention is directed to at least one of the problems of the prior art, and provides a display panel capable of reducing the light reflectivity of a display region without affecting the light transmittance of a transparent region.
The technical solution adopted to solve the technical problem of the present invention is a display panel, including a substrate, and a plurality of pixel units arranged on the substrate, each of the pixel units is divided into a display region and a transparent region, the pixel units include a light emitting device and a driving device which are located on the substrate and correspond to the display region, the display panel further includes: the polarizing layer is positioned on one side, away from the substrate, of the layer where the light-emitting device is positioned; the polarizing layer corresponds to the position of the display area and can absorb the external environment light reflected in the display area; the polarizing layer is arranged at the position corresponding to the transparent area and can transmit the external environment light.
According to the display panel provided by the invention, the polarization layer can carry out different treatments on light in the display area and the transparent area, the external environment light reflected by the display area is absorbed in the display area, and the external environment light is transmitted in the transparent area, so that the light reflectivity of the display area is reduced, the light transmittance of the transparent area is not influenced, the display effect of the display panel is improved, and the transparency of the transparent display panel is not influenced.
Preferably, in the above display panel provided by the present invention, the polarizing layer includes a first alignment layer and a guest-host liquid crystal layer; wherein the content of the first and second substances,
the guest-host liquid crystal layer is positioned on one side of the first alignment layer, which faces away from the substrate;
the first alignment layer corresponds to the position of the display area and has a first alignment direction, so that in a plane perpendicular to the substrate, an included angle between an absorption axis of liquid crystal molecules in the guest-host liquid crystal layer and a direction parallel to the substrate is smaller than 90 degrees;
the first alignment layer is arranged at a position corresponding to the transparent area and has a second alignment direction, so that in a plane vertical to the substrate, an included angle between an absorption axis of liquid crystal molecules in the guest-host liquid crystal layer and a direction parallel to the substrate is equal to 90 degrees.
Preferably, in the above display panel provided by the present invention, the polarization layer further includes at least one set of retardation film group disposed under the first alignment layer and the guest-host liquid crystal layer;
the phase difference film group comprises an alignment layer and a phase difference film; if a plurality of sets of phase difference modules are arranged below the first alignment layer and the guest-host liquid crystal layer, the alignment direction of the alignment layer in each set of phase difference module and the arrangement direction of the liquid crystal molecules in the phase difference film are different.
Preferably, in the above display panel provided by the present invention, the at least one set of retardation film groups includes a first retardation film group including a first retardation film and a second alignment layer;
the first phase difference film is positioned on one side of the first alignment layer close to the substrate, and the second alignment layer is positioned on one side of the first phase difference film close to the substrate;
the second alignment layer has a third alignment direction to control an arrangement direction of the liquid crystal molecules in the first retardation film on a plane parallel to the substrate, so that the first retardation film can increase light absorptance of the guest-host liquid crystal layer.
Preferably, in the display panel provided by the present invention, the at least one retardation film group further includes a second retardation film group, and the second retardation film group includes a second retardation film and a third alignment layer;
the second phase difference film is positioned on one side, close to the substrate, of the first alignment layer, and the third alignment layer is positioned between the second phase difference film and the first phase difference film;
the third alignment layer has a fourth alignment direction to control an arrangement direction of liquid crystal molecules in the second phase difference film on a plane parallel to the substrate, so that the second phase difference film can reduce color shift of the display panel.
Preferably, in the above display panel provided by the present invention, the polarizing layer includes a first alignment layer and a guest-host liquid crystal layer at a position corresponding to the display region; the polarization layer corresponds to the position of the transparent area and comprises a first transparent filling layer on the layer where the first alignment layer and the guest-host liquid crystal layer are positioned; wherein the content of the first and second substances,
the guest-host liquid crystal layer is positioned on one side of the first alignment layer, which faces away from the substrate;
the first alignment layer has a first alignment direction such that, in a plane perpendicular to the substrate, an angle between an absorption axis of liquid crystal molecules in the guest-host liquid crystal layer and a direction parallel to the substrate is less than 90 °.
Preferably, in the above display panel provided by the present invention, the polarization layer corresponds to the position of the display region, and further includes at least one set of retardation film group disposed under the first alignment layer and the guest-host liquid crystal layer; the polarization layer corresponds to the position of the transparent area, and a corresponding transparent filling layer is arranged on the layer where the phase difference film group is located; wherein the content of the first and second substances,
the phase difference film group comprises an alignment layer and a phase difference film;
if a plurality of sets of phase difference modules are arranged below the first alignment layer and the guest-host liquid crystal layer, the alignment direction of the alignment layer in each set of phase difference module and the arrangement direction of the liquid crystal molecules in the phase difference film are different.
Preferably, in the above display panel provided by the present invention, the at least one set of retardation film groups includes a first retardation film group including a first retardation film and a second alignment layer; the polarizing layer corresponds to the position of the transparent area, and a second transparent filling layer is arranged on the layer where the first phase difference film group is located; wherein the content of the first and second substances,
the first phase difference film is positioned on one side of the first alignment layer close to the substrate, and the second alignment layer is positioned on one side of the first phase difference film close to the substrate;
the second alignment layer has a third alignment direction to control an arrangement direction of the liquid crystal molecules in the first retardation film on a plane parallel to the substrate, so that the first retardation film can increase light absorptance of the guest-host liquid crystal layer.
Preferably, in the display panel provided by the present invention, the at least one retardation film group further includes a second retardation film group, and the second retardation film group includes a second retardation film and a third alignment layer; the polarization layer corresponds to the position of the transparent area, and a third transparent filling layer is arranged on the layer where the second phase difference film group is located; wherein the content of the first and second substances,
the second phase difference film is positioned on one side, close to the substrate, of the first alignment layer, and the third alignment layer is positioned between the second phase difference film and the first phase difference film;
the third alignment layer has a fourth alignment direction to control the arrangement direction of the liquid crystal molecules in the second phase difference film on a plane parallel to the substrate, so that the second phase difference film can reduce the color shift of the display panel.
Preferably, in the above display panel provided by the present invention, the first retardation film comprises a quarter-wave retardation film.
Preferably, in the display panel according to the present invention, the second retardation film includes a half-wavelength retardation film.
Correspondingly, the invention also provides a display device which comprises any one of the display panels.
Drawings
Fig. 1 is a schematic structural diagram (top view) of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram (a side view taken along the direction A-B in FIG. 1) of an embodiment of a display panel provided by the present invention;
FIG. 3 is a schematic diagram of a guest-host liquid crystal layer in an embodiment of a display panel according to the present invention;
FIG. 4 is a second schematic structural diagram (a side view taken along the direction A-B in FIG. 1) of another embodiment of the display panel according to the present invention;
fig. 5 is a schematic structural diagram of another embodiment of a display panel provided by the present invention (fig. 4 or the top view of fig. 9);
FIG. 6 is a third schematic structural diagram (a side view taken along the direction A-B in FIG. 1) of another embodiment of a display panel according to the present invention;
fig. 7 is a schematic structural diagram of another embodiment of a display panel provided by the present invention (fig. 6 or the top view of fig. 10);
FIG. 8 is a fourth schematic structural diagram (a side view taken along the direction A-B in FIG. 1) of another embodiment of a display panel according to the present invention;
FIG. 9 is a fifth schematic structural view (a side view taken along the direction A-B in FIG. 1) of another embodiment of a display panel according to the present invention;
FIG. 10 is a fifth schematic structural view (a side view taken along the direction A-B in FIG. 1) of another embodiment of a display panel according to the present invention;
fig. 11 is a flowchart of a manufacturing method of a display panel according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The shapes and sizes of the components in the drawings are not to scale, but are merely intended to facilitate an understanding of the contents of the embodiments of the present invention.
As shown in fig. 1, the present embodiment provides a display panel including a substrate 1, a plurality of pixel units 2, and a polarizing layer 3.
Specifically, as shown in fig. 1 and 2, fig. 2 is an embodiment of a side view of fig. 1 taken along a-B, a plurality of pixel units 2 are disposed on a substrate 1, each pixel unit 1 can be divided into a display area 21 and a transparent area 22, and each pixel unit 2 includes a light emitting device 23 located on the substrate 1 and corresponding to the position of the display area 21 and a driving device 24 of the light emitting device 23. The polarizing layer 3 is located on the side of the layer of the light-emitting device 23 facing away from the substrate 1. The polarizing layer 3 can absorb the external ambient light reflected from the display area 21 at the position where the polarizing layer 3 corresponds to the display area 21, and the polarizing layer 3 can transmit the external ambient light at the position where the polarizing layer 3 corresponds to the transparent area 22.
Further, as shown in fig. 2, in the display panel provided in this embodiment, the light emitting device 23 includes a first electrode 231 and a second electrode 232, a light emitting layer 233 is disposed between the first electrode 231 and the second electrode 232, the first electrode 231 is disposed on a side of the light emitting layer 233 close to the substrate 1 and is connected to the driving device 24, the second electrode 232 is disposed on a side of the light emitting layer 232 away from the substrate 1, and light emitted from the light emitting layer 233 is emitted through the second electrode 232. Alternatively, if the display panel provided in the present embodiment is a top emission type, the first electrode 231 may be an Anode (Anode) and the second electrode 232 may be a cathode (Cathod). If the display panel provided in this embodiment is a bottom emission type, the first electrode 231 may be a cathode and the second electrode 232 may be an anode. The design of the device can be designed according to actual needs, and is not limited herein.
When the display panel is used, after the external ambient light is irradiated into the panel, the driving device 24 and the light emitting device 23 in the display area 21 of the pixel unit 2 reflect the external ambient light irradiated to the surfaces of the driving device 24 and the light emitting device 23, wherein the external ambient light is mainly reflected by the second electrode 232 in the light emitting device 23. In the display panel provided in this embodiment, the polarizing layer 3 can perform different treatments on the external environment light in the display area 21 and the transparent area 22, so that the external environment light reflected by the display area 21 is absorbed in the display area 21, and the external environment light is transmitted in the transparent area 22, and thus the light reflectivity of the display area 21 is reduced, and at the same time, the light transmittance of the transparent area 22 is not affected, so that the display effect of the display panel is improved, and at the same time, the transparency of the transparent display panel is not affected.
It should be noted that in the display panel provided in this embodiment, the driving device 24 may adopt a Passive addressing driving mode (Passive Matrix, PM), an Active addressing driving mode (Active Matrix, AM), or a semi-Active addressing driving mode, which may be specifically designed according to needs and is not limited herein. The following description will be given taking an example in which the drive device adopts an AM drive method.
Further, as shown in fig. 2, in the display panel provided in the present embodiment, the driving device 24 may include a transistor portion and a metal trace portion.
Specifically, taking the example of the driving device adopting the AM driving method as an example, the transistor portion of the driving device may include two thin film transistors for driving the light emitting device 23, such as a first thin film transistor T1 and a second thin film transistor T2, a Buffer layer (Buffer)01 is provided on the side of the substrate close to the light emitting device, and the specific structure of T1, T2 may include a polysilicon layer (P-Si)02 provided on the side of the Buffer layer 01 away from the substrate 1, a first Gate insulating layer (GI)03 provided on the side of the P-Si 02 away from the substrate 1, a first Gate electrode (Gate)04 provided on the GI 03, a second Gate insulating layer (GI)05 provided on the Gate 04, a second Gate electrode (Gate)06 provided on the GI 05, an interlayer Insulating Layer (ILD)07 provided on the Gate 06, and a Planarization Layer (PLN)08 provided on the ILD 07, a connection trace (SD)09 is disposed in PLN 08, SD 09 is connected to Gate 04 through via holes in ILD 07, GI 05 and GI 03, and first electrode 231 in light emitting device 23 is connected to SD 09 through a via hole in PLN 08, so that driving device 24 is connected to light emitting device 23, thereby enabling driving device 24 to drive light emitting device 23 to emit light.
Specifically, the metal trace portion of the driving device includes a metal trace 101 extending from each electrode layer (e.g., GI 04, GI 06) or a trace layer (e.g., SD 09) in the transistor portion of the driving device, the metal trace 101 of the pixel unit is used for connecting the pixel unit 2 with an adjacent pixel unit 2, and each pixel unit 2 is connected through the metal trace 101 to form a pixel layer of the display panel.
It should be noted that, as shown in fig. 2, the display area 21 of the pixel unit 2 may be further divided into a light emitting area 211 and a metal routing area 212, the position of the display area 21 of the pixel unit 2 corresponding to the light emitting area 211 includes a light emitting device 23 and a transistor portion (T1 and T2) of a driving device 24, and the transistor portion of the driving device 24 is located on one side of the light emitting device 23 close to the substrate 1. The display area 21 of the pixel unit 2 includes the metal trace 101 extending from the transistor portion of the driving device 24 at a position corresponding to the metal trace area 212.
The first embodiment,
As shown in fig. 2, in the display panel provided in the present embodiment, the polarizing layer 3 may include a first alignment layer 31 and a guest-host liquid crystal layer 32. Wherein the guest-host liquid crystal layer 32 is located on the side of the first alignment layer 31 facing away from the substrate 1. The first alignment layer 31 serves to control the arrangement direction of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32.
Specifically, the first alignment layer 31 has a first alignment direction N1 corresponding to the display area 21 of the pixel unit 2, such that the angle between the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 and the direction parallel to the substrate 1 is less than 90 ° in the plane perpendicular to the substrate 1, for example, as shown in FIG. 2, the angle between the absorption axis L of the liquid crystal molecules 301 and the direction parallel to the substrate 1 is 0 °. The first alignment layer 31 has a second alignment direction N2 corresponding to the transparent region 22 of the pixel cell 2 such that the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 is at an angle equal to 90 DEG to the direction parallel to the substrate 1 in the plane perpendicular to the substrate 1.
The guest-host liquid crystal layer 32 includes a composition of dichroic dyes and polymerizable liquid crystal molecules. As shown in fig. 3, the dichroic dye has an absorption axis L (in this embodiment, the direction of the absorption axis L of the dichroic dye is parallel to the substrate 1), and if the external environment light G is irradiated onto the dichroic dye, the light vector X of the external environment light G parallel to the absorption axis L of the dichroic dye is absorbed by the dichroic dye, and the light vector Y perpendicular to the absorption axis L of the dichroic dye can be transmitted through the dichroic dye. The dichroic dye can be connected to the liquid crystal molecules 301 by means of branched grafting, so that the liquid crystal molecules have dichroism. Therefore, in the display panel provided in this embodiment, the angle between the absorption axis L of the liquid crystal molecules 301 corresponding to the display area 21 of the pixel unit 2 in the guest-host liquid crystal layer 32 and the direction parallel to the substrate 1 is smaller than 90 °, when the external environment light G is irradiated onto the display panel, since the angle between the absorption axis L of the liquid crystal molecules 301 corresponding to the display area 21 and the direction parallel to the substrate 1 is not perpendicular, at least a portion of the light is absorbed by the liquid crystal molecules 301 with dichroism (as shown in the left side of fig. 3), so as to reduce the external environment light G irradiated onto the driving device 24 and the light emitting device 23, and further reduce the light reflected by the driving device 24 and the light emitting device 23, thereby reducing the light reflectivity of the display area 21. And the angle between the absorption axis L of the liquid crystal molecule 301 corresponding to the transparent region 22 of the pixel unit 2 in the guest-host liquid crystal layer 23 and the direction parallel to the substrate 1 is equal to 90 °, when the external environment light G irradiates the display panel, since the absorption axis L of the liquid crystal molecule 301 corresponding to the transparent region 22 is perpendicular to the direction parallel to the substrate 1, the light transmittance of the liquid crystal molecule 301 is the largest, and thus the external environment light G can directly pass through the liquid crystal molecule 301 (as shown in the right side of fig. 3) and is not absorbed by the liquid crystal molecule 301, thereby not affecting the light transmittance of the transparent region 22 of the pixel unit 2.
Alternatively, as shown in fig. 2, in the display panel provided by the embodiment, an angle between the absorption axis L of the liquid crystal molecule 301 corresponding to the display area 21 of the pixel unit 2 in the guest-host liquid crystal layer 23 and a direction parallel to the substrate 1 may be, for example, 0 °, that is, the absorption axis L of the liquid crystal molecule 301 corresponding to the display area 21 of the pixel unit 2 is parallel to the plane of the substrate 1, at this time, the light absorptivity of the liquid crystal molecule 301 is maximum, and when the external environment light irradiates the display panel, the light absorptivity of the liquid crystal molecule 301 corresponding to the display area 21 of the pixel unit 2 in the guest-host liquid crystal layer 23 to the external environment light is maximum, so that the light reflectivity of the display area 21 can be reduced more.
Optionally, in the display panel provided in this embodiment, based on the structure of the first embodiment, the polarization layer 3 may further include at least one set of retardation film disposed below the first alignment layer 31 and the guest-host liquid crystal layer 32 in the first embodiment. The retardation film set may include an alignment layer and a retardation film. If a plurality of sets of retardation modules are disposed under the first alignment layer 31 and the guest-host liquid crystal layer 32 in the first embodiment, the alignment direction of the alignment layers in each set of retardation modules and the arrangement direction of the liquid crystal molecules in the retardation films are different from each other. The following description will be given by taking examples two and three as examples.
Example II,
As shown in fig. 4, fig. 4 is an embodiment of a side view of fig. 1 taken along a-B, in a display panel provided in this embodiment, at least one set of retardation film groups may include a first retardation film group 33, and the first retardation film group includes 33 a first retardation film 331 and a second alignment layer 332 according to a first embodiment.
Specifically, the first phase difference film 331 is disposed on the side of the first alignment layer 31 close to the substrate 1 in the first embodiment, and the arrangement directions of the liquid crystal molecules in the first phase difference film 331 in the display region 21 and the transparent region 22 of the pixel unit 2 are the same, the second alignment layer 332 is disposed on the side of the first phase difference film 331 close to the substrate 1, and the alignment directions of the second alignment layer 332 in the display region 21 and the transparent region 22 of the pixel unit 2 are the same. The second alignment layer 332 has a third alignment direction according to which the second alignment layer 332 controls the arrangement direction of the liquid crystal molecules in the first retardation film 331 on the plane parallel to the substrate 1, so that the first retardation film 331 can increase the light absorptance of the guest-host liquid crystal layer 32.
Specifically, referring to FIG. 4, in the display region 21 of the pixel unit 2, after the external environment light passes through the guest-host liquid crystal layer 32 and the first alignment layer 31 in the first embodiment, since the light parallel to the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 is absorbed in the external environment light and the light perpendicular to the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 is transmitted, the external environment light passing through the guest-host liquid crystal layer 32 and the first alignment layer 31 becomes the first linearly polarized light whose direction is perpendicular to the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32, the first linearly polarized light becomes the elliptically polarized light after passing through the first retardation film 331, the elliptically polarized light is irradiated onto the light emitting device 23 and the driving device 24, after being reflected by the light emitting device 23 and the driving device 24, passes through the first retardation film 331 again, the second linearly polarized light whose direction is parallel to the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32, the second linearly polarized light is again absorbed by the liquid crystal molecules 301 in the guest-host liquid crystal layer 32. The direction of the first linearly polarized light is perpendicular to that of the second linearly polarized light, that is, after the external environment light is absorbed for the first time by the guest-host liquid crystal layer 32 and is changed into the first linearly polarized light, the first phase difference film 331 changes the first linearly polarized light perpendicular to the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 into the second linearly polarized light parallel to the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32, so that the second linearly polarized light is absorbed again by the guest-host liquid crystal layer 32, and therefore, the first phase difference film 331 can increase the light absorption rate of the guest-host liquid crystal layer 32, and further reduce the light reflectivity of the display area 21 of the pixel unit 2. In the transparent region 22 of the pixel unit 2, unlike the liquid crystal molecules 301 in the guest-host liquid crystal layer 32, the liquid crystal molecules 301 in the first retardation film 331 do not have dichroism, so that the external ambient light irradiated onto the first retardation film 331 is not absorbed by the first retardation film 331, and the external ambient light can directly pass through the first retardation film 331, thereby not affecting the transmittance of the transparent region 22 of the pixel unit 2.
Alternatively, in the display panel provided in the present embodiment, the first phase difference film 331 may be, for example, a quarter-wave phase difference film.
Alternatively, as shown in fig. 5, fig. 5 is a top view of the first retardation film group 33 viewed from the direction F in fig. 4, in the display panel provided in this embodiment, if only the first retardation film group 33 in this embodiment is disposed below the first alignment layer 31 and the guest-host liquid crystal layer 32 in the first embodiment, and the first retardation film 331 is a quarter-wavelength retardation film, taking the top view of the display panel as an example, the angle between the third alignment direction N3 of the second alignment layer 332 and the direction X1 parallel to the lower side of the display panel is 45 °, and accordingly, the angle between the long axis L1 of the liquid crystal molecules in the first retardation film 332 and the direction X1 parallel to the lower side of the display panel is 45 °.
Example III,
As shown in fig. 6, fig. 6 is an embodiment of a side view of fig. 1 taken along a-B, in the display panel provided in this embodiment, based on the second embodiment, at least one phase difference film group may further include a second phase difference film group 34, and the second phase difference film group 34 includes a second phase difference film 341 and a third alignment layer 342.
Specifically, the second phase difference film 341 is located on the side of the first alignment layer 31 close to the substrate 1 in the first embodiment, the arrangement directions of the liquid crystal molecules in the second phase difference film 341 in the display region 21 and the transparent region 22 of the pixel unit 2 are the same, the third alignment layer 342 is located between the second phase difference film 341 and the first phase difference film 331 in the second embodiment, and the alignment directions of the third alignment layer 342 in the display region 21 and the transparent region 22 of the pixel unit 2 are the same. The third alignment layer 342 has a fourth alignment direction according to which the third alignment layer 342 controls the arrangement direction of the liquid crystal molecules of the second retardation film 341 on the plane parallel to the substrate 1, so that the second retardation film 341 can reduce the color shift of the display panel.
Specifically, in the display panel provided in the present embodiment, in the display area 21 of the pixel unit 2, since the polarized light of the external environment light after passing through the guest-host liquid crystal layer 32 and the first retardation film 31 may generate a phase retardation and become monochromatic light, and thus the external environment light may generate color shift on the display panel after being reflected by the light emitting device 23 and the driving device 24, the second retardation film 341 is added between the guest-host liquid crystal layer 32 and the first retardation film 31, so that the external environment light after passing through the guest-host liquid crystal layer 32 and becoming the first linearly polarized light passes through the second retardation film 341, the second retardation film 341 deflects the angle of the first linearly polarized light, and the first retardation film 331 is matched to change the deflection direction of the first linearly polarized light, thereby improving the color shift problem. In the transparent region 22 of the pixel unit 2, unlike the liquid crystal molecules 301 in the guest-host liquid crystal layer 32, the liquid crystal molecules in the second retardation film do not have dichroism, so that the external environment light irradiated onto the second retardation film 341 is not absorbed by the second retardation film 341, and the external environment light can directly pass through the second retardation film 341 without affecting the transmittance of the transparent region 22 of the pixel unit 2.
Alternatively, in the display panel provided in the present embodiment, the second phase difference film 341 may be, for example, a half-wavelength phase difference film.
Alternatively, as shown in fig. 7, fig. 7 is a top view of the first retardation film group 33 and the second retardation film group 34 viewed from the direction F in fig. 6, in the display panel provided in this embodiment, if the first retardation film group 33 in the second embodiment and the second retardation film group 34 in this embodiment are disposed under the first alignment layer 31 and the guest-host liquid crystal layer 32 in the first embodiment, and the first retardation film 331 is a quarter-wavelength retardation film, and the second retardation film 341 is a half-wavelength retardation film, taking the top view of the display panel as an example, the angle between the third alignment direction N3 of the second alignment layer 332 and the direction X1 parallel to the lower side of the display panel is 75 °, and accordingly, the angle between the long axis L1 of the liquid crystal molecules in the first retardation film 331 and the direction X1 parallel to the lower side of the display panel is 75 °. The fourth alignment direction N4 of the third alignment layer 342 makes an angle of 15 ° with the direction X1 parallel to the lower side of the display panel, and accordingly the long axis L2 of the liquid crystal molecules in the second retardation film 341 makes an angle of 15 ° with the direction X1 parallel to the lower side of the display panel.
It should be noted that, based on the structure of the first embodiment, there are various embodiments of the combination and number of the retardation film groups in the polarizing layer 3, and the second embodiment and the third embodiment are only examples of the various embodiments, and may be specifically designed as needed, and are not limited herein.
In the display panel provided in this embodiment, in order to make the polarization layer correspond to the position of the display area, the polarization layer can absorb the external environment light reflected by the display area, the polarization layer corresponds to the position of the transparent area, and the polarization layer can transmit the external environment light, a corresponding polarization film (for example, guest host liquid crystal layer, phase difference film, etc.) may be further disposed at the position of the polarization layer corresponding to the display area, and the position of the polarization layer corresponding to the transparent area is filled with a transparent organic material. The following description will be given by taking example four, example five and example six as examples.
Example four,
As shown in FIG. 8, FIG. 8 is an embodiment of a side view of FIG. 1 taken along A-B, in the present embodiment, a display panel is provided, in which the polarizing layer 3 may include a first alignment layer 31 and a guest-host liquid crystal layer 32 at a position corresponding to the display region 21 of the pixel unit 2. The polarizing layer 3 corresponds to the transparent region 22 of the pixel cell 2, and may include a first transparent filling layer 51 at the layer where the first alignment layer 31 and the guest-host liquid crystal layer 32 are located. Wherein the guest-host liquid crystal layer 32 is located on the side of the first alignment layer 31 facing away from the substrate 1. The first alignment layer 31 serves to control the arrangement direction of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32.
Specifically, the first alignment layer 31 is disposed only at the position of the pixel unit 2 corresponding to the display area 21, and the first alignment layer 31 has a first alignment direction N1 such that the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 is at an angle smaller than 90 ° with respect to the direction parallel to the substrate 1 in the plane perpendicular to the substrate 1.
In the same manner as the first embodiment, the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 have dichroism, and therefore, in the display panel provided in this embodiment, the guest-host liquid crystal layer 32 is only disposed at the position where the pixel unit 2 corresponds to the display area 21, and the angle between the absorption axis L of the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 and the direction parallel to the substrate 1 is less than 90 °, when the external ambient light irradiates the display panel, since the absorption axis L of the liquid crystal molecules 301 is not perpendicular to the direction parallel to the substrate 1, at least a part of the light is absorbed by the liquid crystal molecules 301 having dichroism, so that the external ambient light irradiating the driving device 24 and the light emitting device 23 is reduced, and further, the light reflected by the driving device 24 and the light emitting device 23 is reduced, and thus, the light reflectivity of the display area 21 is reduced. The pixel unit 2 is disposed at a position corresponding to the transparent region 22, and the first transparent filling layer 51 is disposed on the layer where the first alignment layer 31 and the guest-host liquid crystal layer 32 are located, and the first transparent filling layer 51 is made of a transparent organic material, so that when the external ambient light irradiates the display panel, the light can directly penetrate through the first transparent filling layer 51, and the transmittance of the transparent region 22 of the pixel unit 2 is not affected.
Alternatively, in the display panel provided by the embodiment, as shown in fig. 8, an included angle between the absorption axis L of the liquid crystal molecule 301 in the guest-host liquid crystal layer 32 and a direction parallel to the substrate 1 may be, for example, 0 °, that is, the absorption axis L of the liquid crystal molecule 301 in the guest-host liquid crystal layer 32 is parallel to the plane of the substrate 1, at this time, the light absorption rate of the liquid crystal molecule 301 is maximum, and when the external environment light irradiates the display panel, the absorption rate of the liquid crystal molecule 301 in the guest-host liquid crystal layer 32 to the external environment light is maximum, so that the light reflectance of the display area 21 can be reduced more.
Optionally, in the above-mentioned display panel provided in this embodiment, based on the fourth embodiment, the polarization layer 3 may further include at least one set of retardation films disposed below the first alignment layer 31 and the guest-host liquid crystal layer 32 in the fourth embodiment, where the polarization layer corresponds to the position of the display area 21 of the pixel unit 2. The polarizing layer 3 corresponds to the transparent region 22, and a corresponding transparent filling layer is disposed on the layer where the phase difference film group is located. The phase difference film group comprises an alignment layer and a phase difference film. If a plurality of sets of retardation modules are disposed under the first alignment layer 31 and the guest-host liquid crystal layer 32 in the fourth embodiment, the alignment direction of the alignment layers in each set of retardation modules and the arrangement direction of the liquid crystal molecules in the retardation films are different from each other. The following description will be given by taking example five and example six as examples.
Example V,
As shown in fig. 9, fig. 9 is an embodiment of a side view of fig. 1 taken along a-B, in the display panel provided in this embodiment, based on the fourth embodiment, the polarizing layer 3 corresponds to the position of the display area 21 of the pixel unit 2, at least one group of phase difference film groups may include the first phase difference film group 33, and the first phase difference film group 33 includes the first phase difference film 331 and the second alignment layer 332. The polarizing layer 33 corresponds to the transparent region 22 of the pixel unit 2, and may further include a second transparent filling layer 52 on the layer where the first retardation film 33 is disposed.
Specifically, the first phase difference film 331 is disposed only at the position of the pixel unit 2 corresponding to the display area 21, and the first phase difference film 331 is located on the side of the first alignment layer 31 close to the substrate 1 in the fourth embodiment, and the second alignment layer 332 is located on the side of the first phase difference film 331 close to the substrate 1. The second transparent filling layer 52 is provided on the side of the first transparent filling layer 51 close to the substrate 1 in the fourth embodiment. The second alignment layer 332 has a third alignment direction according to which the second alignment layer 332 controls the arrangement direction of the liquid crystal molecules in the first retardation film 331 on the plane parallel to the substrate 1, so that the first retardation film 331 can increase the light absorptance of the guest-host liquid crystal layer 32.
As in the second embodiment, therefore, the first retardation film 331 can increase the light absorption rate of the guest-host liquid crystal layer 32 at the position of the pixel unit 2 corresponding to the display area 21, thereby further reducing the light reflectance of the display area 21 of the pixel unit 2. The second transparent filling layer 52 is disposed at a position of the pixel unit 2 corresponding to the transparent region 22, and on the layer where the first phase difference film 331 and the second alignment layer 332 are located, and the second transparent filling layer 52 is made of a transparent organic material, so that when external ambient light irradiates the display panel, the light can directly pass through the second transparent filling layer 52, and the transmittance of the transparent region 22 of the pixel unit 2 is not affected.
Alternatively, in the display panel provided in the present embodiment, the first phase difference film 331 may be, for example, a quarter-wave phase difference film.
Alternatively, referring to fig. 5, in the display panel provided in this embodiment, if only the first retardation film group 33 in this embodiment is disposed below the first alignment layer 31 and the guest-host liquid crystal layer 32 in the fourth embodiment, and the first retardation film 331 is a quarter-wave retardation film, taking the top view of the display panel as an example, the angle between the third alignment direction N3 of the second alignment layer 332 and the direction X1 parallel to the lower side of the display panel is 45 °, and accordingly, the angle between the long axis L1 of the liquid crystal molecules in the first retardation film 331 and the direction X1 parallel to the lower side of the display panel is 45 °.
Example six,
As shown in fig. 10, fig. 10 is an embodiment of a side view of fig. 1 taken along a-B, in the display panel provided in this embodiment, based on the fifth embodiment, the polarizing layer 3 corresponds to the position of the display area 21 of the pixel unit 2, at least one phase difference film group may further include a second phase difference film group 34, and the second phase difference film group 34 includes a second phase difference film 341 and a third alignment layer 342. The polarizing layer 3 corresponds to the transparent region 22 of the pixel unit 2, and may further include a third transparent filling layer 53 on the layer where the second phase difference film group 34 is located.
Specifically, the second phase difference film 341 is located on the substrate 1 side of the first alignment layer 31 in the fourth embodiment, and the third alignment layer 342 is located between the second phase difference film 341 and the first phase difference film 441 in the fifth embodiment. The third transparent filling layer 53 is positioned between the first transparent filling layer 51 and the second transparent filling layer 52. The third alignment layer 342 has a fourth alignment direction according to which the third alignment layer 342 controls the arrangement direction of the liquid crystal molecules in the second retardation film 341 on the plane parallel to the substrate 1, so that the second retardation film 341 can reduce the color shift of the display panel.
Similar to the principle of the third embodiment, therefore, the second retardation film 341 is disposed at the position of the pixel unit 2 corresponding to the display area 21, and the second retardation film 341 can improve the color shift problem of the display panel. The third transparent filling layer 53 is disposed at a position of the pixel unit 2 corresponding to the transparent region 22, and on the layer where the second phase difference film 341 and the third alignment layer 342 are located, and the third transparent filling layer 53 is made of a transparent organic material, so that when external ambient light irradiates the display panel, the light can directly pass through the third transparent filling layer 53, and the transmittance of the transparent region 22 of the pixel unit 2 is not affected.
Alternatively, in the display panel provided in the present embodiment, the second phase difference film 341 may be, for example, a one-half wavelength phase difference film.
Alternatively, referring to fig. 7, in the display panel provided in this embodiment, if the first retardation film group 33 in the fifth embodiment and the second retardation film group 34 in this embodiment are disposed below the first alignment layer 31 and the guest-host liquid crystal layer 32 in the fourth embodiment, and the first retardation film 331 is a quarter-wavelength retardation film, and the second retardation film 341 is a half-wavelength retardation film, taking a top view of the display panel as an example, an included angle between the third alignment direction N3 of the second alignment layer 332 and the direction X1 parallel to the lower side of the display panel is 75 °, and accordingly, an included angle between the long axis L1 of the liquid crystal molecules in the first retardation film 331 and the direction X1 parallel to the lower side of the display panel is 75 °. The fourth alignment direction N4 of the third alignment layer 342 makes an angle of 15 ° with the direction X1 parallel to the lower side of the display panel, and accordingly the long axis L2 of the liquid crystal molecules in the first retardation film 341 makes an angle of 15 ° with the direction X1 parallel to the lower side of the display panel.
It should be noted that, based on the structure of the fourth embodiment, there are various embodiments of the combination and number of the retardation film groups in the polarizing layer 3, and the fifth embodiment and the sixth embodiment are only examples of the various embodiments, and specifically, may be designed as needed, and are not limited herein.
Alternatively, in the display panel provided in this embodiment, a material of the transparent filling layer (for example, the first transparent filling layer 51, the second transparent filling layer 52, or the third transparent filling layer 53) may be, for example, Polyimide (PI), and of course, may be other materials, as long as the used material does not affect the transparency of the display panel, and is not limited herein.
Alternatively, in the above-described display panel, the alignment layer (e.g., the first alignment layer) for aligning the liquid crystal molecules 301 in the guest-host liquid crystal layer 32 may include a photo-alignment film including a high molecular polymer having a photosensitizer therein, and the high molecular polymer having the photosensitizer may be made to have an alignment ability by irradiating Ultraviolet (UV) rays onto the high molecular polymer having the photosensitizer, thereby implementing an alignment function of the photo-alignment film.
Alternatively, in the display panel, the alignment layers (e.g. the second alignment layer 332 and the third alignment layer 342) in the retardation film group for aligning the arrangement direction of the liquid crystal molecules in the retardation film may be various types of alignment films, such as a photo-alignment film or a Rubbing (Rubbing) alignment film, which may be designed according to the needs, and are not limited herein.
Alternatively, as shown in fig. 2, the present embodiment may also provide a display panel in which Pixel Defining Layers (PDL)25 are provided between different light emitting devices 23, and the PDL 25 is used to separate the light emitting regions of the respective light emitting devices 23.
Optionally, as shown in fig. 2, in the display panel provided in this embodiment, a Thin Film Encapsulation layer (TFE) 26 may further be included above the light emitting device 23, and the TFE 26 may include two inorganic Film layers and an organic Film layer located therebetween, where a material of the inorganic Film layer may be, for example, silicon oxynitride or silicon nitride, and a material of the organic Film layer includes a polymer (polymer), for example, polyacrylate, etc., of course, other materials may also be used, as long as transparency of the display panel is not affected, and the invention is not limited herein.
Alternatively, as shown in fig. 2, the present embodiment provides a display panel in which the pixel unit 2 corresponds to the transparent region 22, and the space between the substrate 1 and the polarization layer 3 may be filled with a transparent material, for example, the same material as the PLN layer in the pixel unit.
Alternatively, the material of the substrate 1 of the display panel provided in this embodiment may be, for example, Polyimide (PI), and of course, may be other materials as long as the used material does not affect the transparency of the display panel, and is not limited herein.
Optionally, in the display panel provided in this embodiment, the guest-host liquid crystal layer 32 includes a mixture of liquid crystal molecules and dichroic dyes, the dichroic dyes may be a single dichroic dye or a mixture of multiple dichroic dyes, and the solubility of the dichroic dyes in the liquid crystal molecules is higher, which may be specifically selected according to needs, and is not limited herein.
Optionally, in the display panel provided in this embodiment, the wavelength dispersion that the dichroic dye can absorb is between 450nm and 650nm, or between 380nm and 780nm, which may be specifically designed according to needs, and is not limited herein.
Correspondingly, the embodiment also provides a display device comprising the display panel. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
Correspondingly, the embodiment also provides a manufacturing method of the display panel.
Specifically, referring to fig. 11, taking the display panel in the third embodiment as an example, and taking the alignment layer as a photo-alignment film as an example, the manufacturing method of the display panel specifically includes:
s601, manufacturing a substrate, manufacturing a driving device and a light emitting device on the substrate, and then manufacturing a thin film encapsulation layer (TFE) on the light emitting device for encapsulation.
S602, a second alignment layer is formed on the TFE layer.
Specifically, the side of the TFE layer away from the substrate is coated with PI and cured to form a second alignment layer, and then the second alignment layer is irradiated with UV to make the high molecular polymer in the second alignment layer have alignment capability and form a third alignment direction of the second alignment layer.
Alternatively, the temperature at which curing is performed may be between 85 ℃ and 140 ℃ to protect the elements in the light emitting device.
S603, a first retardation film is formed on the second alignment layer.
Specifically, a side of the second alignment layer facing away from the substrate is coated with a polymerizable liquid crystal with a quarter-wave retardation to form a first retardation film, the first retardation film is irradiated with UV, the first retardation film is cured, and liquid crystal molecules in the first retardation film are arranged in a third alignment direction in the second alignment layer.
S604, a third alignment layer is formed on the first retardation film.
Specifically, a side of the first retardation film, which is away from the substrate, is coated with PI and cured to form a third alignment layer, and the third alignment layer is irradiated with UV to make the high molecular polymer in the third alignment layer have alignment capability and form a fourth alignment direction of the third alignment layer.
S605, a second phase difference film is manufactured on the third alignment layer.
Specifically, a polymerizable liquid crystal with a half-wavelength phase difference is coated on the side, away from the substrate, of the third alignment layer to form a second phase difference film, the second phase difference film is irradiated with UV, the second phase difference film is cured, and liquid crystal molecules in the second phase difference film are arranged in a fourth alignment direction in the third alignment layer.
S606, a first alignment layer is formed on the second retardation film.
Specifically, one side of the second phase difference film, which is far away from the substrate, is coated with PI and is cured to form a first alignment layer, a mask is used to cover the position of the first alignment layer, which corresponds to the transparent region of the pixel unit, and UV is used to irradiate the position of the first alignment layer, which corresponds to the display region of the pixel unit, so that the high molecular polymer of the first alignment layer, which corresponds to the display region, has a first alignment direction. And then, the position of the first alignment layer corresponding to the pixel unit display area is covered by using a mask plate, and the position of the first alignment layer corresponding to the pixel unit transparent area is irradiated by using UV (ultraviolet) so that the high polymer of the first alignment layer corresponding to the transparent area has a second alignment direction.
S607, a guest-host liquid crystal layer is manufactured on the first alignment layer.
Specifically, a mixture of dichroic dye and polymerizable liquid crystal molecules is coated on a side of the first alignment layer facing away from the substrate to form a guest-host liquid crystal layer, and both ends of the polymerizable liquid crystal molecules may include a photo-polymerization reactive group, and when ultraviolet rays are irradiated to the photo-polymerization reactive group, a polymerization reaction is generated to form an optical axis of the liquid crystal molecules. And then, irradiating the guest-host liquid crystal layer by using UV (ultraviolet), curing the guest-host liquid crystal layer, and enabling the liquid crystal molecules of the guest-host liquid crystal layer, which correspond to the pixel unit display area, to be arranged in a first alignment direction, and the liquid crystal molecules of the guest-host liquid crystal layer, which correspond to the pixel unit transparent area, to be arranged in a second alignment direction.
Alternatively, in the display panel provided in this embodiment, if the polarizer (e.g., guest host liquid crystal layer or phase difference film group) is only disposed at the position of the pixel unit corresponding to the display area, and the position of the pixel unit corresponding to the transparent area is filled with the transparent material, that is, the transparent filling layer is disposed, each alignment layer needs to be irradiated with UV light by using a mask, so that only the high molecular polymer at the position of the display area in the alignment layer has alignment capability. And stripping the high molecular polymer which is coated on the transparent area of the pixel unit and used for forming the alignment layer by utilizing the technologies of photoetching, developing and the like. And then arranging a transparent filling layer at the position of the pixel unit corresponding to the transparent area.
In summary, in the display panel provided by the present invention, the polarizing layer 3 can perform different treatments on the display area 21 and the transparent area 22 of the pixel unit 2, so that the display area 21 absorbs the external ambient light reflected by the display area 21, and the transparent area 22 transmits the external ambient light, thereby reducing the light reflectivity of the display area 21, and simultaneously not affecting the light transmittance of the transparent area 22, so as to improve the display effect of the display panel, and simultaneously not affecting the transparency of the transparent display panel.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (12)

1. A display panel comprising a substrate, and a plurality of pixel units disposed on the substrate, each of the pixel units being divided into a display region and a transparent region, the pixel units including a light emitting device and a driving device on the substrate at positions corresponding to the display regions, characterized by further comprising: the polarizing layer is positioned on one side, away from the substrate, of the layer where the light-emitting device is positioned; wherein the content of the first and second substances,
the position of the polarization layer corresponding to the display area can absorb the external environment light reflected in the display area; the polarizing layer is positioned corresponding to the transparent area and can transmit external environment light;
the position of the polarization layer corresponding to the display area comprises a first alignment layer and a guest-host liquid crystal layer, and the first alignment layer is used for controlling the arrangement direction of liquid crystal molecules in the guest-host liquid crystal layer;
the guest-host liquid crystal layer is positioned on one side of the first alignment layer, which faces away from the substrate;
the first alignment layer corresponds to the position of the display area and has a first alignment direction, so that in a plane perpendicular to the substrate, an included angle between an absorption axis of liquid crystal molecules in the guest-host liquid crystal layer and a direction parallel to the substrate is smaller than 90 degrees;
the polarizing layer further includes at least one set of retardation film groups disposed under the first alignment layer and the guest-host liquid crystal layer.
2. The display panel according to claim 1,
the first alignment layer is arranged at a position corresponding to the transparent area and has a second alignment direction, so that in a plane vertical to the substrate, an included angle between an absorption axis of liquid crystal molecules in the guest-host liquid crystal layer and a direction parallel to the substrate is equal to 90 degrees.
3. The display panel according to claim 2,
the phase difference film group comprises an alignment layer and a phase difference film; if a plurality of sets of phase difference modules are arranged below the first alignment layer and the guest-host liquid crystal layer, the alignment direction of the alignment layer in each set of phase difference module and the arrangement direction of the liquid crystal molecules in the phase difference film are different.
4. The display panel according to claim 3, wherein the at least one set of retardation film groups comprises a first retardation film group comprising a first retardation film and a second alignment layer;
the first phase difference film is positioned on one side of the first alignment layer close to the substrate, and the second alignment layer is positioned on one side of the first phase difference film close to the substrate;
the second alignment layer has a third alignment direction to control an arrangement direction of the liquid crystal molecules in the first retardation film on a plane parallel to the substrate, so that the first retardation film can increase light absorptivity of the guest-host liquid crystal layer.
5. The display panel according to claim 4, wherein the at least one phase difference film group further comprises a second phase difference film group including a second phase difference film and a third alignment layer;
the second phase difference film is positioned on one side, close to the substrate, of the first alignment layer, and the third alignment layer is positioned between the second phase difference film and the first phase difference film;
the third alignment layer has a fourth alignment direction to control an arrangement direction of liquid crystal molecules in the second phase difference film on a plane parallel to the substrate, so that the second phase difference film can reduce color shift of the display panel.
6. The display panel of claim 1, wherein the polarizing layer corresponds to the transparent region and comprises a first transparent filling layer in a layer where the first alignment layer and the guest-host liquid crystal layer are located.
7. The display panel according to claim 6, wherein the polarization layer corresponds to a position of the display region, and further comprising at least one set of retardation films disposed under the first alignment layer and the guest-host liquid crystal layer; the polarization layer corresponds to the position of the transparent area, and a corresponding transparent filling layer is arranged on the layer where the phase difference film group is located; wherein the content of the first and second substances,
the phase difference film group comprises an alignment layer and a phase difference film;
if a plurality of sets of phase difference modules are arranged below the first alignment layer and the guest-host liquid crystal layer, the alignment direction of the alignment layer in each set of phase difference module and the arrangement direction of the liquid crystal molecules in the phase difference film are different.
8. The display panel according to claim 7, wherein the at least one set of retardation film groups comprises a first retardation film group comprising a first retardation film and a second alignment layer; the polarizing layer corresponds to the position of the transparent area, and a second transparent filling layer is arranged on the layer where the first phase difference film group is located; wherein the content of the first and second substances,
the first phase difference film is positioned on one side, close to the substrate, of the first alignment layer, and the second alignment layer is positioned on one side, close to the substrate, of the first phase difference film;
the second alignment layer has a third alignment direction to control an arrangement direction of the liquid crystal molecules in the first retardation film on a plane parallel to the substrate, so that the first retardation film can increase light absorptance of the guest-host liquid crystal layer.
9. The display panel according to claim 8, wherein the at least one phase difference film group further comprises a second phase difference film group including a second phase difference film and a third alignment layer; the polarization layer corresponds to the position of the transparent area, and a third transparent filling layer is arranged on the layer where the second phase difference film group is located; wherein the content of the first and second substances,
the second phase difference film is positioned on one side, close to the substrate, of the first alignment layer, and the third alignment layer is positioned between the second phase difference film and the first phase difference film;
the third alignment layer has a fourth alignment direction to control the arrangement direction of the liquid crystal molecules in the second phase difference film on a plane parallel to the substrate, so that the second phase difference film can reduce the color shift of the display panel.
10. The display panel according to any one of claim 4 or claim 8, wherein the first retardation film comprises a quarter-wave retardation film.
11. The display panel according to any one of claims 5 or 9, wherein the second phase difference film comprises a half-wavelength phase difference film.
12. A display device comprising the display panel according to any one of claims 1 to 11.
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